Paper-making machine



April 8 1924.

E. J. WILSQN PAPER MAKING MACHINE Filed Dec. 2. 1922 with/663.

wax

Patented Apr. 8, 1924.

UNITED "STATES 1,489,623 PATENT OFFICE.

'EZEKIEL J. WILSON, OF EAST GREENBUSH. NEW YORK, ASSIGNOR TO F. HUYCK & SONS, OF RENSSELAER, NEW YORK, A CORPORATION OF NEW YORK.

PAPER-MAKIN G MACHINE.

Application filed December 2, 1922. Serial No. 604,496.

To all whom it may 'cmwem:

Be it known that I, EZEKIEL J. WILSON, a citizen of the United States, residing at East Greenbush, in the county of Rensselaer and State of New York, have invented certain new and useful Improvements in Paper-Making Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art towliich it appertains to make and use the same.

The invention relates to paper making machines.

In these machines the moist web of paper stock formed on the F ourdrinier were is passed through a series of presses, each one of which is provided with an endless felt and with a pair of pressure rolls between which the felt carries the web of stock.

Each felt is carried on a series of supporting rolls including a felt stretching roll which may be adjusted to regulate the tension on the felt. The proper operation, as well as the life of the felt, is largely de pendent upon the maintenance of the proper tension thereon. If the tension is too light the felt will not operate properly upon the web of stock, while too heavy a tension, particularly if continued, will tend to destroy and shorten the life of the felt. The present invention enables the tension under which the felt is being run to be determined so that, proper adjustments may be made to maintain that tension which is best suited to secure the proper operation of the felt on the stock and at the same time prolong the life of the felt. This result is accomplished b the application to each end of one of t e rolls over which the felt runs of means for indicating the pull on the roll due to the tension of the felt passing over it. The tension on each edge of the felt is thus known and proper adj ust men-ts of the rolls over which the felt runs may be made to secure uniform tension chine. These devices are also preferably so constructed and operated that they may be located at any desired point, however remote from the roll over which the felt is running. The indicating devices may, therefore, be located where theymay be most conveniently inspected by the operator or superintendent,

and the danger of continued operation of plication of the preferred form of the invention to a Fourdrinier paper machine, Fig. 2 is" a, detailed diagrammatic view showing the mechanism for indicating and recording the ull applied by the felt to the roll over w ich it runs, and Fig. 3 is a detail plan view illustrating the application of the indicating mechanism to each end of the roll,

In Fig. 1 the Fourdrinier wire on which the paper stock is formed into a web is indicated at 2, the lower couch roll about which the wire passes is indicated at 4, and the upper felt jacketed couch roll which presses the stock into compact web form is indicated at 6. The continuous web of paper stock S formed on the wire passes from the couch rolls through a series of presses, each one of which comprises an endless felt 8 and a pair of press rolls 10 between which the web is carried by the felt. The felt is carried on a series of supporting rolls, in-

cluding a. stretch roll 12 which may be adjusted to regulate the tension under which the felt runs.

In applying the present invention to the machine outlined above one of the felt carrying rolls 14 which lies within a loop of the felt is so mounted that each end may move independently of the other under the pull exerted on the roll by the felt and each end of the roll is connected with a fixed sup ort through a spring link whichis distorte by the pull on the roll and by reason of thls distortion operates devices which indicate the pull exerted by the felt passing over the roll. In the construction shown thespring link comprises an elliptical spring 16 one end of which is connected by a hook 18 with the end of the roll, and the other end of which is connected by an adjustable hook 20 with a fixed part 22 of the machine frame. A variation in the pull exerted on the roll 14 by the felt will result in a movement of the sides of the spring 16 toward or away from each other, which movement is proportional to such variation. This movement is utilized to operate an indicating mechanism which may be of any suitable construction, but which is preferably so constructed and operated that .its indicating devices may be located at any desired point, however remote from the end of the roll. As shown the indicatin means comprises an electric circuit including two synchronized magnetic fields 24 and 26 within which are arranged two similar armatures 28 and 30. The field 28 is mounted on a plate 32 secured to one side of the spring 16 and is connected in series with the field 26 by the wire 34 of an electric circuit so that the field 26 may be located at any desired point, however remote from the field 24. The armature 28 within the field 24 is mounted on the plate 32 so that it may rotate within the field and its position is determined by a rack 36 secured to the other side of the spring 16, and engaging a pinion on the pivot of the armature. The armature 30 is mounted to rotate within the field 26 and is provided at its axis with a pinion engaging a segment 38 which is secured to the pivot 40 of an indicatin and recording finger 42. The end of the finger which ma stylus is arranged to p as over a scale which may be graduated to-in icate in pounds the pull on the end of the roll 14 or may be igraduated to indicate the tension on. the felt corresponding to varying positions of the finger. The scale may be formed on a chart arran ed to be rotated by clock mechanism and divlded into hour periods as is common f in recording indicators.

Movement of the sides of the elliptical spring 16 toward or from each other will result in a rotation of the armature '28 within'the magnetic field 24 and this will be accompanie by a corresponding movement of the armature 30 within the field'26 and the positions of the armatures-within the fields Wlll depend upon the relation of the two sides of the spring to each other and there.

fore to the pull being exerted upon the roll 14 by the felt passi .over it. The finger 42 will, therefore, in icate, or indicate and record, the pull on the corres nding end of the roll 14 or the tension of t at edge of the felt passin about this'end of the roll. The stretch ro 12 may, therefore, be adjusted to secure the desired tension on the felt and the proper adjustments made to secure an carry a recordingequal tension at eachedge and, therefore, throu hout the width of the felt. Whenever t 1ere is variation from this normal tension it will be registered by the indicating devices so that it may be immediately ob served by the operator and the proper adjustments made to restore the tension to normal. The indicating devices, therefore, enable the operator to make and maintain the adjustments requisite for running the felts under the most desirable and economical conditions and to avoid the application of excessive tension which shortens the life of the felt and destroys its efficiency.

While it is preferred to employ substantially the construction and arrangement of parts shown and described this construction and arrangement is not essential to the broader features of the invention and may be varied'or modified as found desirable or best suited to the conditions under which the invention is to be used.

What is claimed is:

1. A paper making machine having, in combination, a felt for supporting the moist web of paper stock and carrying it between press rolls, a roll over which the felt runs, means for indicating the pull exerted on the roll by the felt, and means for regulating the tension of the felt.

2. A paper making machine having, in combination, a felt for supporting the moist web of paper stock and car ing it between press rolls, a roll over whic the felt runs, means for indicating the pull exerted on each end of the roll y the felt, and means for regulating the tension of the felt.

3. A paper making machine having, in combination, a felt for supporting the moist web of per stock and carr ing it between press roll; a roll over whicfi the felt runs, means for recording the pull exerted on the roll 'by the felt, and means for regulating the tension of the felt.

4. A paper making machine having, in combination, a. felt for supporting the moist Web of paper stock and carrying it between press ro ls,'a roll over which the felt runs, a s ring link connected to each end of the ml to resist the pull of the felt thereon, andindicatin devices operated by the resulting distortion of thelmk, and means for regulating the tension of the felt.

.5. A paper making machine having, in combination, a felt for supporting the moist web of paper stock and carrying it between prss rolls, a roll over which the felt runs, means for indicating at a point remote from the roll the pull of the felt thereon, and means for regulating the tension of the felt.

6. A paper making machine having, in combination, a felt for supporting the moist web of paper stock and carrying it between press rolls, means for indicating during the operation of the machine the tension under which the felt is runnin and means for regulating the tension of t 1e felt.

7. A paper making machine having, in combination, afelt for supporting the moist web of paper stock and carr ing it between press rolls, means for recor ing during the operation of the machine the tension under which the felt is running, and means for regulating thetension of the felt.

8. A paper making machine having, in combination, a felt for supporting the moist web of pa or stock and carrying it between ress rol s, two synchronized magnetic elds with armatures therein, mechanism connected to relatively move one armature and field in accordance with variations in th tension of the felt, indicating devices actuated by the accompanying relative movement of the other armature and field, and means for regulating the tension of the felt.

9. A paper making machine having, in combination, a felt for supporting the moist web of aper stock and carrying it between press rolls, a roll over which the felt runs, aspring link connected to each end of the roll to resist the pull of the felt thereon, two sychronized magnetic fields with armatures therein corresponding to each link, one field and armature being connected to'relatively move by distortion of the link, indicating devices connected to be operated by the accompanying movement of the other field and armature, and means for regulating the tension of the felt.

EZEKIEL J. \VILSON 

